Abstract
The mechanism by which tumour necrosis factor (TNF)-alpha increases the susceptibility of U87-MG human glioblastoma cells to lysis by natural killer (NK) cells was studied. Treatment with TNF-alpha (100 units ml-1) for 48 h enhanced the susceptibility of tumour cells to lysis by NK cells. Increased susceptibility to lysis was associated with enhanced expression of intercellular adhesion molecule 1 (ICAM-1) and HLA class I antigen. Antisense ICAM-1 oligonucleotide inhibited lysis by NK cells of TNF-alpha-treated tumour cells. In contrast, acid treatment following TNF-alpha treatment increased lysis by NK cells. These findings indicate that TNF-alpha treatment of glioblastoma cells increased their susceptibility to lysis by NK cells, since ICAM-1 up-regulation would have more profound effects on NK susceptibility than would HLA class I antigen up-regulation.
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Kondo, S., Yin, D., Takeuchi, J. et al. Tumour necrosis factor-α induces an increase in susceptibility of human glioblastoma U87-MG cells to natural killer cell-mediated lysis. Br J Cancer 69, 627–632 (1994). https://doi.org/10.1038/bjc.1994.123
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DOI: https://doi.org/10.1038/bjc.1994.123